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| 型號： | L8575 |
| 英文描述： | Dual-Resistive,Low-Cost Subscriber Line Interface Circuit(SLIC) |
| 中文描述： | 雙電阻，低成本用戶線接口電路（SLIC） |
| 文件頁數(shù)： | 33/36頁 |
| 文件大?。?/td> | 633K |
| 代理商： | L8575 |
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Advance Data Sheet
March 1997
L8575
Dual-Resistive, Low-Cost SLIC
Lucent Technologies Inc.
33
Application Diagram
The following diagram and table show the basic components required with the L8575 SLIC. Specific component
values are given in cases where the value is fixed. In cases where the value may change (i.e., components that
determine the ac interface), the value is not listed but equations to determine these values are given later in this
document.
Table 16. External Components Required
* Power is continuous RMS power.
R
1
/R
2
= 1, with a tolerance of 0.35% for 50 dB longitudinal balance, 0.2% for 58 dB longitudinal balance. Fuses on F1 and F2 provide fail-safe
operation if excessive overvoltage conditions exist on Tip and Ring. They will not operate if the total power dissipation of the entire resistor
network is >5.0 W at 85
°
C.
(R
3
x R
6
)/(R
4
x R
5
) = 1 with a tolerance of 0. 35% for 50 dB longitudinal balance, 0.2% for 58 dB longitudinal balance.
§ R
9
/R
1
= 100 with a tolerance of 0.5%.
Comp.
R
1
R
2
R
3
R
4
R
5
R
6
R
7
R
8
R
9
C
VCC
C
VDD
C
BAT
R
CBN
C
CBN
C
RF
R
RF1
R
RF2
R
RTH
C
FLTA
C
B1
C
B2
R
T1
R
T2
R
GX
R
GX1
R
RV1
R
RV2
C2 or C
S
R
HB1
Function
dc Feed Protection
dc Feed Protection
Transmit Gain
Transmit Gain
Transmit Gain
Transmit Gain
Protection
Protection
Battery Noise Cancellation
V
CC
Filter
V
DD
Filter
V
BAT
Filter
Battery Noise Cancellation
Battery Noise Cancellation
Ring Trip
Ring Trip
Ring Trip
Ring Trip Threshold
Fault Filter
dc Blocking
dc Blocking
ac Interface
ac Interface
ac Interface
ac Interface
ac Interface
ac Interface
ac Interface
ac Interface
Implementation
Resistor Module
Resistor Module
Resistor Module
Resistor Module
Resistor Module
Resistor Module
Resistor Module
Resistor Module
Resistor Module
External
External
External
External
External
External
External
External
External
External
External
External
External
External
External
External
External
External
External
External
Value
300
300
100 k
100 k
200 k
200 k
1.4 k
1.4 k
15 k
0.1
μ
F
0.1
μ
F
0.1
μ
F
301 k
0.1
μ
F
0.1
μ
F
1 M
1 M
11 M
0.1
μ
F
0.1
μ
F
0.1
μ
F
34 k
7.32 k
150 k
52.3 k
113 k
35.7 k
2.7 nF
221 k
Attribute*
1.0%, 2 W
1.0%, 2 W
1.0%, 25 mW
1.0%, 25 mW
1.0%, 25 mW
1.0%, 25 mW
2.0%, 0.1 W
2.0%, 0.1 W
10 mW
§
20%, 10 V
20%, 10 V
20%, 100 V
1%, 1/16 W
20%, 100 V
20%, 100 V
20%, 100 V
1%, 1/16 W
1%, 1/16 W
20%, 100 V
20%, 50 V
20%, 50 V
1%, 1/32 W
1%, 1/32 W
1%, 1/32 W
1%, 1/32 W
1%, 1/32 W
1%, 1/32 W
5%, 10 V
1%, 1/32 W
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